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公开(公告)号：US20220294290A1
公开(公告)日：2022-09-15
申请号：US17739887
申请日：2022-05-09
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI , Aki FUKUHARA
IPC分类号： H02K1/2783 , H02P25/22 , H02P6/182
摘要： A rotating electrical machine equipped with a magnetic field-producing unit which includes a magnet unit having magnets each of which has easy axes of magnetization oriented to extend linearly parallel to each other and defines a plurality of magnetic paths along the easy axes of magnetization. The magnets are discrete from each other through a d-axis defined on the center of the magnetic pole and a q-axis defined on a magnetic boundary between the magnetic poles. The magnets are configured to have a back electromotive force constant which is higher than that of parallel-oriented magnets when an angle of rotation of the rotor lies in a first angle range including the gravity center of the magnets. The parallel-oriented magnets are designed to have magnetic paths which are different from those of the magnets of the magnet unit and oriented along easy axes of magnetization extending linearly parallel to the d-axis.
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公开(公告)号：US20220077738A1
公开(公告)日：2022-03-10
申请号：US17489133
申请日：2021-09-29
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI
摘要： A rotating electrical machine includes a magnetic field generator that includes a magnet unit that has magnetic polarities. The magnet polarities alternate in a circumferential direction of the rotating electrical machine. The rotating electrical machine includes an armature that comprises multi-phase armature windings. One of the magnetic field generator and the armature serves as a rotor. Each of the multi-phase armature windings includes conductor members arranged at regular intervals in the circumferential direction to face the magnet unit. Each of the multi-phase armature windings includes a heat dissipation passage defined in each of the conductor members for dissipation of heat from the corresponding one of the conductor members.
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公开(公告)号：US20210367494A1
公开(公告)日：2021-11-25
申请号：US17340748
申请日：2021-06-07
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI
摘要： In a rotating electrical machine, an armature includes a filmy sheet member secured to one of an inner peripheral surface and an outer peripheral surface of a base member to cover one of the inner peripheral surface and the outer peripheral surface of the base member. A sheet member is made of thermoplastic resin as non-magnetic material, and has a field-member side peripheral surface. Each conductive member has at least part embedded in the sheet member in a radial direction of the rotating electrical machine to thereby arrange a base-member side peripheral surface to be radially closer to the base member than the field-generator side peripheral surface of the sheet member is.
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公开(公告)号：US20210328488A1
公开(公告)日：2021-10-21
申请号：US17358992
申请日：2021-06-25
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI
IPC分类号： H02K21/02
摘要： A voltage limit ellipse is defined in a d-q coordinate system of a rotating electric machine by d-axis and q-axis currents flowing through an armature coil when the magnitude of a voltage vector applied to the armature coil is equal to a voltage limit value. The product of the number of electrical conductor sections per pole in each phase and the number of poles of the rotating electric machine is set to have, when the rotational speed of the rotating electric machine is equal to a maximum rotational speed, the center of the voltage limit ellipse located outside an electric-current limit circle and in a negative d-axis region in the d-q coordinate system and a positive-d-axis-side vertex of the voltage limit ellipse located inside or on the electric-current limit circle.
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公开(公告)号：US20210273511A1
公开(公告)日：2021-09-02
申请号：US17320952
申请日：2021-05-14
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI
摘要： In a rotating electrical machine, each magnet installation hole is formed to be in conformity with a radial cross-sectional shape of a corresponding magnet to be installed therein. Each of the magnets and the corresponding magnet installation holes has opposite peripheral surfaces. One of the opposite peripheral surfaces serves as a far-stator peripheral surface located to be further from a stator than the other thereof. The far-stator peripheral surface of each of the magnets and the corresponding magnet installation holes has a circumferential end and a circumferential middle. The magnet unit has a first radial dimension defined from the circumferential end of the far-stator surface to the stator, and a second radial dimension defined from the circumferential middle of the far-stator surface to the stator. The first radial dimension is lower than the second radial dimension.
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公开(公告)号：US20210257950A1
公开(公告)日：2021-08-19
申请号：US17233739
申请日：2021-04-19
申请人： DENSO CORPORATION
发明人： Makoto TANIGUCHI , Yuki TAKAHASHI
摘要： A control apparatus of a rotary electric machine includes a rotor; a stator including a multiphase stator winding provided with conductor portions arranged in a circumferential direction thereof. The rotary electric machine is configured of any one of a first configuration having a first inter-conductor member using a magnetic material; a second configuration having a second inter-conductor member using a non-magnetic material; and a third configuration having no inter-conductor member. The control apparatus includes: a drive circuit with switching elements provided for each phase, supplying power to the multiphase stator winding; and a control unit controlling the drive circuit such that a period where a conduction ratio of the switching elements for one phase in the drive circuit is maintained at a constant value is more than or equal to 120 degrees and less than 180 degrees in electrical angle.
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公开(公告)号：US20210175780A1
公开(公告)日：2021-06-10
申请号：US17156903
申请日：2021-01-25
申请人： DENSO CORPORATION
发明人： Tomohisa SANO , Yuki TAKAHASHI , Ryota TANABE , Yuta HASHIMOTO , Wataru FUNATSU , Norihiro HAYASHI
摘要： A rotating electric machine includes: a field element that includes a magnet portion that includes a plurality of magnetic poles; an armature that includes an armature winding of multiple phases; and a power converter that is electrically connected to the armature winding.
The rotating electric machine also includes: a plurality of electrical components that configure the power converter; and a housing member that includes a cylindrical portion that is provided on a radially inner side of a magnetic circuit portion that includes the magnet portion and the armature winding, and to which the plurality of electrical components are disposed. The cylindrical portion is provided with a coolant passage through which a coolant flows. The plurality of electrical components are arranged in the housing member on a radially inner side of the cylindrical portion, in a circumferential direction along the cylindrical portion.-
公开(公告)号：US20200336027A1
公开(公告)日：2020-10-22
申请号：US16915027
申请日：2020-06-29
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI
摘要： In a rotating electrical machine, a field element includes a field element core to which magnets are fixed. The magnet has a pair of first acting surfaces opposing each other and through which a magnetic flux flows in or flows out, and a second acting surface serving as an inflow surface or an outflow surface for magnetic flux in a q-axis-side end portion. Between an acting surface on the armature side of the pair of first acting surfaces and the second acting surface, the magnet has a magnet magnetic path that extends from one acting surface to the other. The field element core has a q-axis-side portion adjacent in the circumferential direction to the acting surface of the magnet. A controller controls an energization phase of phases of an armature winding to cause a state of magnetic saturation of the q-axis-side portion of the field element core to be variable.
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公开(公告)号：US20200161939A1
公开(公告)日：2020-05-21
申请号：US16748195
申请日：2020-01-21
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI , Makoto TANIGUCHI
摘要： A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.
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公开(公告)号：US20170133968A1
公开(公告)日：2017-05-11
申请号：US15341381
申请日：2016-11-02
申请人： DENSO CORPORATION
发明人： Yuki TAKAHASHI
CPC分类号： H02P25/184 , H02K1/2766 , H02K3/30 , H02K3/345 , H02K3/50 , H02K5/1732 , H02K15/0421 , H02K2203/09 , H02P25/22
摘要： A rotating electric machine includes a rotor and a stator. The stator includes a stator core and a stator coil. The stator coil includes three first windings, three second windings and three switch units. The first windings are Δ-connected to define three nodes therebetween. The second windings are arranged so as to be respectively connectable between the nodes and three phase terminals of the stator coil. The switch units respectively switch the connections between the nodes and the phase terminals between a direct connection state and an indirect connection state. In the direct connection state, the nodes are respectively directly connected with the phase terminals. In the indirect connection state, the nodes are respectively connected with the phase terminals via the second windings. The first and second windings are mounted on the stator core so that the first windings are located closer than the second windings to the rotor.
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